Correction hone



Feb. 18, 1958 T. E. BROOKS 2,823,497

. CORRECTION HONE Y Filed Aug. 22, -1955 5 Sheets-Sheet 1 I J1 Z7 4] 26 .92 5 13 29 32 fade/Z297 fiMmZTfiroo/s Feb. 18, 1958 'r. E. BROOKS 2,323,497

CORRECTION HONE Filed Aug. 22, 1955 5 Sheets-Sheet 2 T. E. BROOKS CORRECTION HONE Feb. 18, 1958 s Shets-Sheet 3 Filed Aug. 22, 1955 2,823,497 CORRECTION SHONE Thomas Brooks, ,Clarinrlja; Iowa,-; assignor to Lisle Corporation, (llarinda, Iowa, a corporation of Iowa Application August n-1955; Serial Nb. 529,687 9 claims. ui-1843i connecting: thev camstogether. and carriers for bones. and

wiper'rbladeswhich'are carried by the cams, air-adjusting means being provided for thehe'ad relative to thecams and the head cooperating with .the carriers: to adjust withi'nthe range of'adjustment of the tool.

Still another object1is::to.providera base cam and a top: cam" of; die cast construction provided with other-thanround bores in which an other-than-roundirod isxl-o'cated;

the: cams being fixed to the other-than-roundi bore being slidable'on the.

rod; and a head; having an: rod and propellediowardthecams by an adjusting nut for adjust ing the effective size of" homes in hone carriers that co=- operatewith the cams and'the head, one of theeamsfbeing adjustable along the rod so as to position it' th'ereo'n'initially for accurate parallelism between diametrically opposite hone faces.

A further object i's-t-o provide the cams with cam-lands and notches, adjustingly and guidingly coacting with the carriers, and the adjustable head coactingwith the upper ends of the carriers and having guide grooves'therefor' that all of the pl'uralit'yof hone carriers are properly aligned and rig'idly connected together in an assembly for accurate honing operation at any adjusted position:

Still afurther objectis toprovide means; for'r'e't'aining' the carriers against'the cams and contracting the-diameter ofthe tool' wh'enth'e adjusting nut' is adjusted in a smaller-' diameter direction, which means is adaptable to-die can: construction and consists of tension springs having their ends connected to the cams and their intermediatepor tionsf hooked over spring hooks of the carriers and dc flamed outwardly so that they tend to pull the carriers inwardly at all times. t

With these and other'objects in view, my invention consists in the construction, arrangement and'combination of the various parts of my correction cylinder hone; whereby the objects above contemplated" are attained; as hereinafter more fully set forth, pointedout in my claims' and illustrated in detail on the accompanying drawings;

wherein: I I g s M Fig. 1' is a" side elevation of a correction honing tool for cylinders embodying r'ny invention;

Fig'. 2is a horizontal sectional view thereof on the line of Fig. l and showsa universal drive connectionin section;

them relative to the cams'for different sizesoficylindersi United States Patent 2,823,497 hearte Fsklfilh? "ice 2; ,Fig; 3 is a vertical sectional: view onthe of g-7 v V v Fig. 4 is a horizontal sectionalt'view onthe line-4 4 ofFig: 1 toishow the;coaction-"of.upper endsrof the'hone carriers with' ahead of thertoiol;

Fig. 5 is. a horizontal: sectional view. on the.'line"5-5 of Fig, 1 to show how, thehones and: wipers'are' mounted in their carriers and how'thecar'riers coact with the-top' camofthe'tool; g g

,,Fig;, 6 .is a similar. sectionalview. on the 1inei6-6'0ff Fig: 1. showing the carriers, coacting with? the: base cam: of the tool and showingidetails'of thewcontractingsprings: for the bones to move them' to asmaller diameterwhen the tool is so adjusted and to at all. times "keep the'carriersz engaged. with the base and topcams ofthe tool;

Fig. 7'is a verticalsectionalview similar to Fig: 3'but shows the parts in an expanded position for honingi a: cylinder of larger diameter;-

Fig. 8, is a horizontalsectional view-on the line 8.-81 of Fig. 7; v

Fig; 9 is an underside perspective view of the-head of the tool; M

Fig; 10 is a perspective viewof'thetop-andbase cams: of the tool. and the springsfor'contracting the carriers-,1

Fig. 11 is a perspectiveview of one'of the hone carriers;

Fig. 12 is a similar perspectiveview ofthev honecarrier" as viewed from the opposite side;

Fig. 13 is. anenlarged detail-sectional view onrthe'line': 13-13 of Fig. 10 showingthe connectionof. one OfithB': springs to one ofthe camsrand s Fig.: 14 is afurther enlarged-gviewpf: the portion? ofi Fig-2 shown withinthe ellipse. 14 .on=Eig112. N V v On. the accompanying drawings. I: have. used 1 the refer? ence character H to represent in-generalaheadofmy,tool The tool also includes abase cam B, a toprcarn T, and a. plurality-of carriers C for honesiand/or wipers which'are shown'at 45=and46 respectively. v s

Referring; to constructional details; of the" head I -I-,". hich is best shown in Fig, 9,- a disc IS and'a hub;16 are; integrally formed preferably-of die: cast-v material. The: disc 15 has a plurality of slots- 18. formed therein andan other-than-round bore 17 which, as illustrated, may;- behexagon in shape.

For rotating the head H and thereby the. honirigtool;

I provide a yoke 19 having at shank- (whichmay be: suitably connected-to-an electric drillor. other source of; power), a ring 52, drive pins 21 and drive studsforming a universaljoint connection. ThedrivepinsZI may be threaded into the hub lfi and thej drive studs-53 may be pressed or riveted in;the'yoke 14,"both the pins 21 "and the studsv 53 being pivoted in; openings. at; 90. intervalsv in the ring 52 as illustrated particularly in:

j The top'cam T is. also a die casting havinga: plurality. of notches 22-therein terminating in cam la-nds 23; which are inclined. Adjacent each cam-land231is a guide face- 23a. The top cam T also hasa hexagon:bore.24 and on: itslower surface is provided with four spring bossesls the purpose of which will hereinafter appear.

, The base cam B is;somewhat similar tothe top'cam T in construction; being;forrned of die cast materialand; havingnotches 26," cam lands 27, a hexagon; bore; 283 and spring bosses 30. Asshown in Fig. 3 the-lower end of the hexagon bore 28 has an inturned fl nge 29:

A hexagonrod 31 is provided for connecting the base;- cam B and the top cam T together. The'lower end ofa this rod as shown in Fig. 3 has a socket 33 whiclr'is; threaded, and a screw 32' is received therein to-di'aw the lower end of the hexagon rod against the-flange 29;. thushxingthe base cam B'in relation to: the rod.

The top-cam. T has a boss;34 which; as; shownin Fig.2

7, is provided with a set screw 35. Below the boss there is a jamb nut 36. The purpose of the set screw and the jamb nut will hereinafter appear.

1 -As shown in Fig. 14 the hexagon rod 31 is threaded across its corners as indicated at 51 and the jamb nut 36 coacts with these threads. Also there is an adjusting nut 38 coacting with them at the top of the rod and between the adjusting nut and the hub 16 is thrust washer 37, preferably of the ball bearing type.

Referring to the carriers C (see Figs. 11 and 12), each is in the form of a die casting having a vertical cam blade portion 39 provided with an upper cam face 49 and a lower cam face 41. The cam face 41 has an extension at 42 and the outline of the cam faces and this extension are shown by dotted lines in these two figures.

The cam faces 40 and 41-42 are inclined similarly to the cam lands 23 and 27 (which are substantially parallel to each other and inclined in the same direcnon) in order to fit against these faces when the parts are assembled as shown in Figs. 1 and 3, for instance.

Each carrier C has a socket portion 43 in which a channel 44 is located and in these channels hones 45 or wiper blades 46 may be cemented. The channels 44, in turn, are held in the sockets 43 by set screws 47, as shown particularly in Fig. 5. A preferable arrangeent where there are four carriers is to have two homes and two wiper blades, as illustrated, alternately arranged.

Each carrier C further includes a spring hook 48. Tension springs 49 connect the bosses 25 and 30 together and are secured in the bosses by cotter keys 50 as shown in Fig. 13. These springs are under some tension and in the assembled position of the parts as shown in Fig. 1 their intermediate portions must be displaced outwardly from the axis of rotation of the tool to hook into the spring hooks 48 of the carriers C so that they tend to pull the carriers inwardly to retain their cam faces engaging the cam lands of the cams B and T.

Assuming the tool to be adjusted to the position shown in Figs. 1, 2, 3, 4 and 6 to hone a cylinder of the diameter indicated by the dot-and-dash line 54, if the adjusting nut 38 is rotated further up the hexagon rod 31, the springs 49 will cause the cam faces 40 and 41'42 to follow the cam lands 23 and 27 as the upward adjustment of the nut permits the head H to likewise move upwardly on the hexagon rod. During this movement the upper ends of the cam blades 39 are guided by the grooves 18 and the minimum adjustment occurs when the inner edges of the blades strike each other as shown in Fig. whereupon the diameter of the circle is as indicated at 55.

On the other hand, if the nut 38 is adjusted downwardly relative to the hexagon rod the efiective diameter of the tool will be expanded as to the circle 56 shown in Fig. 8, the expanded size of the tool in this figure also being shown in Fig. 7. It will be noted that the spring 49 have been displaced further outward yet remain effective to hold the cam faces and cam lands in engagement both at the top and the bottom of the tool, with equal movement along the cam inclines to maintain the diametrically opposite faces of the homes parallel to each other so that a tapered honing job on the cylinder does not result. 7

Initially, the tool may be adjusted to parallelism of the bones by having the set screw 35 loose and adjusting the jamb nut 36 until the opposite hone faces measure parallel, whereupon the set screw and the jamb nut may be tightened. Thus compensation for manufacturing variation in dimensions can be taken care of and the entire tool made up of die cast parts requiring no machining and a minimum of dressing of working surfaces.

From the foregoing specification it will be obvious that I have designed a correction hone for cylinders which is particularly adaptable for fabrication from die cast parts throughout. Some changes may be made in the construction and arrangement of the parts thereof without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modified forms of structure or use of mechanical equivalents which may reasonably be included within their scope.

I claim as my invention:

1. In a correction hone for cylinders, a base cam and a top cam connected together, tension springs having their ends connected to said cams, a threaded rod extending from said top cam, a head slidably mounted on said rod, adjusting means on said rod to propel said head toward said cams, said cams having cam lands inclined in directions parallel to each other, hone carriers each having a cam face engaging a land of each of said cams and an end engaging said head, said carriers having spring hooks receiving intermediate portions of said springs, said intermediate portions being deflected by said hooks away from the axis of said hone to effect contraction of the effective diameter of said carriers when said adjusting means is adjusted away from said cams.

2. In a tool of the character disclosed, a base cam and a top cam connected together, tension springs having their ends connected to said cams, a rod extending from said top cam and being threaded, a head having a bore receiving said extending end of said rod, means on said extending end to propel said head toward said cams, said cams having cam lands inclined in directions parallel to each other, and tool carriers each having a cam face engaging a land of each of said cams and an end engaging said head, said carriers having spring hooks receiving intermediate portions of said springs.

3. In a correction honing tool, a base cam and a top cam connected together, tension springs having their ends connected to said cams, a threaded rod extending from said top cam, a head slidable and non-rotatable on said rod, an adjusting nut on said rod, said cams having cam lands inclined in directions parallel to each other, hone carriers each having a pair of cam faces engaging the lands of said cams and an end engaging said head, said carriers having projections engaging intermediate portions of said springs and deflecting them away from the axis of said tool to effect contraction of the elfective diameter of said carriers.

4. In a correction hone for cylinders, 21 bottom guide element, an upper guide element spaced axially from said bottom guide element, said guide elements being connected to constitute a hone body in which, in operation, said guide elements remain in fixed relationship to each other, a rod extending axially from the diametrical center of said upper guide element, an axially adjustable head on said rod, said rod having thread means thereon for adjusting said head toward said guide elements, said guide elements having axially aligned outwardly opening hone carrier receiving slots, said slots having therein a set of cam lands inclined in directions parallel to each other, hone carriers in said slots, each of said hone carriers having a cam face engaging cam lands of each of said guide elements and an end engaging said adjustable head such that when said adjustable head is adjusted axially toward said guide elements, said hone carriers are simultaneously adjusted axially to positions where the bottom ends of said hone carriers project below the bottom end of said hone body to permit honing close to the bottom of a blind end hole and also project outwardly relative to said guide elements to increase the effective diameter of said hone carriers, and resilient means for retaining said carriers in said slots.

5. In a correction hone for cylinders, a bottom guide element, an upper guide element spaced axially from said bottom guide element, said guide elements being connected together in fixed axial relationship to constitute a correction hone body, a rod extending axially from the diametrical center of said upper guide element, an axially adjustable head on said rod, said rod having thread means thereon for adjusting said head toward said guide elements, said guide elements having axially aligned outwardly opening hone carrier receiving slots, said slots having therein a set of cam lands inclined in directions parallel to each other, hone carriers in said slots, each of said hone carriers havingoa cam face engaging cam lands of each of said guide elements and an end engaging said adjustable head such that when said adjustable head is adjusted axially toward said guide elements, said hone carriers are simultaneously adjusted axially to positions where the bottom ends of said hone carriers project below the bottom end of said hone body to permit honing close to the bottom of a blind end hole and also project outwardly relative to said guide elements to increase the elfective diameter of said hone carriers, and resilient means for retaining said carriers in said slots, portions of said cam lands being offset from the diametrical center of said hone.

6. In a correction hone for cylinders, a bottom guide element, an upper guide element spaced axially from said bottom guide element, said guide elements being connected to constitute a hone body, a rod extending axially from the diametrical center of said upper guide element, an axially adjustable head on said rod, said rod having thread means thereon for adjusting said head toward said guide elements, said guide elements having axially aligned outwardly opening hone carrier receiving slots, said slots having therein a set of cam lands inclined in directions parallel to each other, hone carriers in said slots, each of said hone carriers having a cam face engaging cam lands of each of said guide elements and an end engaging said adjustable head, said carriers each having an outwardly facing surface intermediate its cam faces, and elongated resilient carrier collapsing means having their ends connected with said guide elements and their intermediate portions engaging said outwardly facing surfaces for retaining said cam faces against said cam lands.

7. In a correction hone for cylinders, a bottom guide element, an upper guide element spaced axially from said bottom guide element, said guide elements being connected to constitute a hone body, a rod extending axially from the diametrical center of said upper guide element, an axially adjustable head on said rod, said rod having thread means thereon for adjusting said head toward said guide elements, said guide elements having axially aligned outwardly opening hone carrier receiving slots, said slots having therein a set of cam lands inclined in directions parallel to each other, hone carriers in said slots, each of said hone carriers having a cam face engaging cam lands of each of said guide elements and an end engaging said adjustable head such that when said adjustable head is adjusted axially toward said guide elements said hone carriers are simultaneously adjusted axially to positions where the bottom ends of said hone carriers project beyond the bottom end of said hone body to permit honing close to the bottoms of blind end holes, and also project outwardly relative to said guide elements to increase the effective diameter of said hone carriers, portions of said cam lands and said cam faces being offset from the diametrical center of said hone such that portions of said cam faces may, when said carriers are adjusted radially inwardly to their smallest diameter, project past the transverse diametrical center of said hone to provide maximum engagement and support for said carriers when said carriers are adjusted outwardly.

8. In a cylinder hone, a base cam and a top cam, means connecting said cams together, said cams having therein outwardly opening hone carrier receiving slots, hone carriers in said slots, said slots having therein cam lands inclined in directions parallel to each other for slidably supporting said carriers, said cam slots having side Walls for embracing said hone carriers, each of said hone carriers having a cam face engaging a cam land in each of said cam portions of said cam slot walls, portions of said cam lands and cam faces being offset from the periphery of said connecting means between said cams such that portions of said cam faces may, when said carriers are adjusted diametrically to their smallest diameter, project past the periphery of said connecting means between said cams to provide maximum engagement and support for said carriers in said slots when said carriers are adjusted outwardly, means on said hone to adjust said carriers diametrically relative to said cams, and means for retaining said carriers in said cam slots.

9. In a correction hone for cylinders, a bottom guide element, an upper guide element spaced axially from said bottom guide element, means connecting said guide elements to constitute a hone body in which, in operation, said guide elements remain in fixed relationship to each other, a rod extending axially from the diametrical center of said upper guide element, an axially adjustable head on said rod, said rod having thread means thereon for adjusting said head toward said guide elements, said guide elements having therein outwardly opening hone carrier receiving slots, hone carriers in said slots, said slots having therein cam lands inclined in directions parallel to each other for slidably supporting said carriers, said slots having side walls for embracing the sides of said hone carriers, each of said hone carriers having a cam face engaging a cam land in each of said slots and an end engaging said adjustable head such that when said adjustable head is adjusted axially toward said cams, said hone carriers are simultaneously adjusted axially to positions where the bottom ends of said hone carriers project below the bottom end of said hone body to permit honing close to the bottom end of a blind end hole and also project outwardly relative to said hone body to increase the effective diameter of said hone carriers, portions of said cam lands and said cam faces being off-set from the periphery of said connecting means between said guide elements such that portions of said cam faces may, when said carriers are adjusted diametrically to their smallest diameter, project past the periphery of said connecting means between said guide elements to provide maximum engagement and support for said carriers in said slots when said carriers are adjusted outwardly, said carriers each having an outwardly facing surface intermediate its ends, and resilient carrier collapsing means for engaging said outwardly facing surfaces for retaining said cam faces against said cam lands.

References Cited in the file of this patent UNITED STATES PATENTS 1,345,929 Johnson July 6, 1920 1,904,336 Sunnen .2 Apr. 18, 1933 2,269,378 Palotce Ian. 6, 1942 2,331,523 Wacker Oct. 12, 1943 2,345,930 Fulmer Apr. 4, 1944 2,412,419 Palotsee Dec. 10, 1946 2,596,961 Smole May 13, 1952 2,710,497 Billeter June 14, 1955 FOREIGN PATENTS 402,108 Great Britain Nov. 23, 1933 

